1720012800 has 312 divisors, whose sum is σ = 6215986080. Its totient is φ = 416153600.

The previous prime is 1720012793. The next prime is 1720012813. The reversal of 1720012800 is 82100271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3378946 + ... + 3379454.

Almost surely, 2^1720012800 is an apocalyptic number.

1720012800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1720012800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3107993040).

1720012800 is an abundant number, since it is smaller than the sum of its proper divisors (4495973280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1720012800 is a wasteful number, since it uses less digits than its factorization.

1720012800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1720012800 is about 41473.0370240714. The cubic root of 1720012800 is about 1198.1482551150.

The spelling of 1720012800 in words is "one billion, seven hundred twenty million, twelve thousand, eight hundred".